Cherne, a subsidiary of Kiewit, has completed multiple projects at the El Segundo Refinery.

In 2012, Cherne completed work on three process units: sour water stripping unit, sulfur recovery unit, tail gas treating unit. The constrained work area required detailed planning for the transportation of four large columns through the operating refinery and their subsequent lifting into place. Detailed planning and execution resulted in a successful project which met all client expectations.

In 2010, Cherne completed work on the depentanizer unit and the naphtha hydrotreater.